frequently asked questions


CNG stands for Compressed Natural Gas. It’s a natural gas that has been compressed to a pressure of up to 250 bar (3,600 psi) to fit into a smaller volume for transportation and storage. CNG is primarily composed of methane (CH4) and is used as a fuel for vehicles, particularly in areas where natural gas is abundant or where there are environmental concerns about traditional gasoline or diesel fuels. It’s considered a cleaner alternative to gasoline and diesel because it produces fewer emissions of pollutants such as nitrogen oxides and particulate matter.

Yes, CNG (Compressed Natural Gas) is widely recognized as a safe fuel option when handled and stored properly. It is non-toxic and odorless in its natural state, with an odorant added for leak detection purposes. CNG has a narrow flammability range (5% to 15% concentration in air), reducing the likelihood of accidental ignition compared to other fuels. Additionally, it has a higher ignition temperature than gasoline and diesel, further lowering the risk of spontaneous combustion. CNG storage tanks are engineered to withstand high pressures and are rigorously tested to ensure durability and safety under various conditions. Strict regulations and standards govern the installation, maintenance, and use of CNG systems, complemented by ventilation and detection systems to promptly identify any leaks. These measures collectively contribute to CNG’s reputation as a safe and viable alternative fuel choice.

Various types of vehicles can undergo CNG (Compressed Natural Gas) conversion, primarily those with internal combustion engines that can be modified to run on CNG instead of or in addition to gasoline or diesel. This includes cars, trucks, vans, buses, and some off-road vehicles. Typically, vehicles equipped with spark-ignition engines (petrol engines) are easier to convert to run on CNG compared to diesel engines, although diesel engine conversions are also possible with additional modifications. The feasibility and process of conversion can vary based on the vehicle’s engine type, age, and local regulations governing vehicle modifications for alternative fuels.

Yes, if a car is equipped with a CNG kit, it can typically switch to running on petrol once the CNG supply is depleted. Most CNG conversion kits are designed to allow the vehicle to seamlessly switch between CNG and petrol fuel modes. This flexibility is particularly useful in areas where CNG refueling stations are not widely available or during longer journeys where CNG might run out before reaching the next refueling point. The driver usually has the option to manually switch between CNG and petrol modes using a switch or control provided by the conversion kit.

The expenses involved in converting a vehicle to be compatible with CNG typically include the cost of the CNG conversion kit, installation fees, and potentially additional modifications to the vehicle. Conversion kits can vary in price depending on the type of vehicle, the complexity of the kit, and the quality of components. Installation fees may also vary based on labor costs and the specific requirements of the vehicle. Additionally, there might be costs associated with obtaining necessary certifications or inspections depending on local regulations. It’s advisable to consult with certified professionals or CNG conversion specialists to get accurate cost estimates and ensure compliance with safety and regulatory standards.

The capacity of a CNG cylinder can vary depending on its size and the vehicle’s conversion setup. Typically, CNG cylinders for vehicles range in capacity from around 50 liters to 100 liters of water equivalent (LWE).

The mileage or distance one can travel on a full CNG tank depends on several factors, including the vehicle’s fuel efficiency on CNG, the cylinder’s capacity, and driving conditions. On average, vehicles running on CNG can travel a comparable distance to gasoline-powered vehicles on a full tank, but this can vary widely based on vehicle type and driving habits.

To determine the remaining quantity of CNG in the cylinder, most CNG vehicles are equipped with a gauge or indicator that shows the pressure or level of gas remaining in the cylinder. This gauge helps drivers monitor the CNG levels and plan refueling accordingly. Additionally, some vehicles may have warning lights or alarms to alert drivers when the CNG level is low, prompting them to refill the tank.

After converting to CNG, you can generally expect a reduction in your fuel expenses. CNG (Compressed Natural Gas) is often less expensive per unit of energy compared to gasoline or diesel, which can result in savings on fuel costs over time. However, the actual savings will depend on factors such as the price difference between CNG and traditional fuels in your area, your vehicle’s fuel efficiency on CNG, and your driving habits. Generally, CNG is known for being a cost-effective alternative fuel option, particularly where it is readily available and competitively priced.

Converting your car to CNG typically does impact its storage space, especially in the boot area. This is because CNG cylinders, which store the compressed natural gas, require additional space. In many cases, the installation of a CNG cylinder may reduce the available storage space in the trunk or boot of the vehicle. The extent of this impact can vary depending on the size and configuration of the CNG cylinder and the specific design of the vehicle. It’s advisable to check with a certified CNG conversion provider or specialist to understand how the conversion will affect your vehicle’s storage capacity before proceeding.

Using CNG generally does not have detrimental effects on the engine and is often considered beneficial. CNG burns cleaner than gasoline or diesel, resulting in reduced carbon deposits and contaminants that can lead to longer engine life. However, proper maintenance, including using appropriate lubricants to compensate for CNG’s cleaner combustion properties, is important to prevent potential issues such as reduced lubrication. It’s also crucial to ensure that CNG conversions are performed by reputable installers using high-quality components to maintain optimal engine performance and longevity. Overall, CNG can be a reliable and environmentally friendly fuel choice for vehicles when installed and maintained correctly.

Compared to other fuels like gasoline and diesel, CNG (Compressed Natural Gas) generally offers several environmental advantages. It produces lower levels of harmful emissions such as carbon dioxide (CO2), nitrogen oxides (NOx), and particulate matter (PM) during combustion. These pollutants contribute significantly to air quality degradation and climate change. Additionally, CNG combustion emits fewer greenhouse gases overall compared to gasoline and diesel, making it a cleaner alternative fuel option. However, the environmental benefits of CNG can vary depending on factors such as the source of natural gas extraction and the efficiency of vehicle technology.

The CNG kit ensures safety and ease of use. It provides years of reliable performance without frequent maintenance needs. Like any other fuel system, regular servicing is recommended. Consultation with an authorized technician is essential for maintenance. According to the Gas Cylinder Rules of 1981, the cylinder must undergo hydrostatic testing every three years to ensure pressure tolerance.


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